mcp-registry/mcp-server-langfuse

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       /// MCP ///
      /// MCP ///
        
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    [server:online]
    [protocol:ready]

mcp-server-langfuse

by langfuse

Model Context Protocol (MCP) Server that exposes Langfuse prompt management via the MCP Prompts specification and fallback tools.

121
26
Open Source
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01

prompts/list

List all available prompts with optional cursor-based pagination, returning prompt names and their arguments and a next cursor if more pages exist

02

prompts/get

Retrieve a specific prompt, converting Langfuse text or chat prompts into MCP prompt objects and compiling it with provided variables

03

get-prompts

List available prompts, accepting an optional cursor parameter for pagination and returning prompts with their arguments

04

get-prompt

Retrieve and compile a specific prompt by name, with an optional JSON object of arguments for variable substitution

Installation

1. Prerequisites
• Node.js ≥ 18 and npm (or pnpm/yarn)
• A Langfuse project with API keys (Public & Secret)
2. Clone the repository
git clone https://github.com/langfuse/mcp-server-langfuse.git cd mcp-server-langfuse
3. Install dependencies
npm install # or: pnpm install / yarn install
4. Configure environment
Create a .env file (or export variables in your shell): LANGFUSE_PUBLIC_KEY=lf_public_xxx LANGFUSE_SECRET_KEY=lf_secret_xxx LANGFUSE_HOST=https://app.langfuse.com # or your self-hosted URL PORT=3000 # optional, default 3000
5. Build & start
# For development (ts-node/dev-reload) npm run dev # For production npm run build npm start
6. (Optional) Docker
-e LANGFUSE_PUBLIC_KEY=$LANGFUSE_PUBLIC_KEY \
-e LANGFUSE_SECRET_KEY=$LANGFUSE_SECRET_KEY \
-e LANGFUSE_HOST=$LANGFUSE_HOST langfuse/mcp-server
docker build -t langfuse/mcp-server . docker run -p 3000:3000 \ After the server starts, the MCP endpoints are accessible at http://localhost:3000/.

Documentation

License: MIT License
Updated 7/30/2025